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Types of Axons
Axons are of two types
In the case of myelinated axons the neurilemma is ensheathed by another covering, the myelin sheath, composed of complex lipoproteins. The terminal branches, dendrites, cell body (perikaryon) and the initial region of the axon (the axon hillock) are devoid of myelin sheath: Although the dendrites are relatively short, unsheathed, tapering, irregular in diameter, and branched in a wide array of patterns, the cell body cytoplasm extends into them. The dendrites receive synaptic endings over much of their surface and thus constitute the receptive surface of the neuron. They are like receiving antennae as a nerve cell receives messages along the dendrites but sends messages along the axon.
what is the meaning of direct and indirect respiration
What is the typical localization of the tropical forests regarding latitude? Tropical rain forests, as the Amazon forest and the Congo forest, are typically located in low lati
Q What are the two big groups into which cells are classified? Cells can be classified as prokaryotic or eukaryotic. Prokaryotic cell is that with no delimited nucleus. Eukaryo
Q. Is a viral infection treated with the same kind of drug that treats bacterial infections? The Antibacterial drugs, potent against a great variety of bacteria, are not effect
MIDDLE LAMELLA It is thin, amorphous, intercellular matrix between 2 adjacent plant cell. The cells of plant tissue generally cemented together by an intercellular matrix
Which term is used to describe organisms that live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to greatest ocean depths? a)
Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations.
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Ecosystem Control Another important aspect of ecosystem functioning that is how it maintains its ecological balance. By now, it must be obvious to you that an ecosystem is a d
Q. Does each amino acid have a central carbon? To which organic group is that central carbon bound? A carboxyl group -NH 2 , an atom of hydrogen - COOH, an amine group-H and a
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